Categories

The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• UFO incidents involving military personnel‏‎ (1 member)
• UFO researchers‏‎ (1 member)
• UFO sightings‏‎ (3 members)
• UFO sightings in Brazil‏‎ (1 member)
• UFO sightings in the United States‏‎ (4 members)
• UFO writers‏‎ (1 member)
• USO sightings‏‎ (1 member)
• Ufologists‏‎ (2 members)
• Ufology‏‎ (14 members)
• Unconventional energy sources‏‎ (1 member)
• Unincorporated communities in Nevada‏‎ (1 member)
• United States Air Force‏‎ (4 members)
• United States Air Force bases‏‎ (2 members)
• United States Air Force facilities‏‎ (0 members)
• United States Air Force generals‏‎ (1 member)
• United States Air Force installations‏‎ (8 members)
• United States Air Force navigational boxes‏‎ (1 member)
• United States Air Force personnel‏‎ (5 members)
• United States Air Force reservists‏‎ (1 member)
• United States Air Force units and formations in the Korean War‏‎ (1 member)
• United States Army Air Forces officers‏‎ (1 member)
• United States Army Air Forces personnel‏‎ (1 member)
• United States Army Air Forces pilots of World War II‏‎ (1 member)
• United States Army personnel of World War II‏‎ (1 member)
• United States Marines‏‎ (1 member)
• United States Navy‏‎ (1 member)
• United States Navy personnel of the Vietnam War‏‎ (1 member)
• United States Navy sailors‏‎ (1 member)
• United States and the Antarctic‏‎ (1 member)
• United States government responses to UFOs‏‎ (2 members)
• United States intelligence operations‏‎ (1 member)
• University of Arizona alumni‏‎ (1 member)
• Unprintworthy redirects‏‎ (1 member)
• Unsolved problems in astronomy‏‎ (1 member)
• Unsolved problems in biology‏‎ (1 member)
• Unsolved problems in physics‏‎ (1 member)
• Use American English from April 2019‏‎ (1 member)
• Use American English from April 2024‏‎ (1 member)
• Use American English from January 2022‏‎ (1 member)
• Use American English from July 2022‏‎ (1 member)
• Use American English from March 2019‏‎ (1 member)
• Use American English from May 2019‏‎ (1 member)
• Use British English from August 2016‏‎ (1 member)
• Use British English from June 2023‏‎ (1 member)
• Use dmy dates from February 2020‏‎ (1 member)
• Use dmy dates from January 2015‏‎ (1 member)
• Use dmy dates from July 2018‏‎ (1 member)
• Use dmy dates from July 2019‏‎ (1 member)
• Use dmy dates from June 2024‏‎ (1 member)
• Use dmy dates from November 2019‏‎ (1 member)